File:Black Pool (6 July 2012) 5.jpg
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[edit]DescriptionBlack Pool (6 July 2012) 5.jpg |
English: Black Pool is a moderately large hot spring in the Lower Group of Yellowstone's West Thumb Geyser Basin. The irregularly-shaped, moderately deep basin is about 21 x 13 meters in size. The name is in reference to its pre-1991 appearance (see a 1987 photo: www.nps.gov/features/yell/slidefile/thermalfeatures/hotsp...). In the early 1990s, a new geyser appeared from a pre-existing small spring next to Black Pool. On 15 August 1991, an explosion removed material from between the new geyser and Black Pool itself. This was followed by hours of small, short eruptions and heavy overflow into Yellowstone Lake. Black Pool, now enlarged, heated up - this changed the color from greenish-black to greenish-blue. A couple larger eruptive series also occurred in February and March 1992.
In 2000, researchers measured the temperature of Black Pool's water at 73 degrees Celsius, with a pH of about 8.0 (= slightly alkaline). |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/13343251945/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/13343251945. It was reviewed on 13 December 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 December 2022
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:14, 13 December 2022 | 4,288 × 2,848 (4.96 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/13343251945/ with UploadWizard |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D90 |
Exposure time | 1/200 sec (0.005) |
F-number | f/8 |
ISO speed rating | 200 |
Date and time of data generation | 14:14, 6 July 2012 |
Lens focal length | 18 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Ver.1.00 |
File change date and time | 14:14, 6 July 2012 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 14:14, 6 July 2012 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3.6 APEX (f/3.48) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
DateTime subseconds | 00 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 27 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.2.0.0 |
Structured data
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6 July 2012
0.005 second
18 millimetre
200
image/jpeg
e818b55c8bccc7129532603152057ed2e6ec7c54
5,195,730 byte
2,848 pixel
4,288 pixel
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